So the question I would like to propose is that: is what comes natural to you the best vehicle to express your creativity? I think that this is very likely the case. While it's good to dabble in other areas to expand your horizons, it's always best to default to your best form of expression. It's interesting because even within certain disciplines - writing, art, music, photography, or otherwise - you will discover niches within those disciplines. Some are better at poetry, others at prose, others at free writing or stream of consciousness. Some are great sketch artists, others painters, and others masters of mixed media. In music, it can be a particular instrument or instruments that seem to fit your personality and mannerisms best. Photography can be just point and shoot, but the possibilities of subjects are limitless. It's whatever feels natural. If it's feeling forced, then it's not the best vehicle.
Of course, there are the performing arts, as well: dancing, singing, theater, and many more. Even then, there are niches within those, as well. It's all about finding the category of expression that fits you best, then find the best avenue in which to excel in that particular performing art. While it's awesome to be good at performing arts in addition to other forms of expression, it's not one hundred percent necessary. It's also not good to spread yourself out in too many directions at once, and the performing arts especially require a great deal of time and dedication to perform at a high level.
Then there are the crafting arts, and there are too many of those to list. The interesting thing about crafting is that the time and energy you put into it all depends on what materials and methods you’re using. Of all art forms, it may have the most limitless permutations ever.
I'm not saying that writing or traditional art take less time and dedication than the performing or crafting arts - that's certainly not true. But what I'm saying is that it's best to focus the most time on whichever "feels" the most natural.
What do you feel is your best vehicle to express your creativity?